how to get data from other plugins?

Hey there!
I'm a new dev and I'm working on my first plugin ever, since some days I was developping without problems, my plugin was okay, working without problems, but some friends asked me to handle PermissionEX prefixes, and then ,I'm blocked because I can't get them however the way I used to! Could you help me please?

here is the ways I used to get these:

Code:java

PermissionManager ownPEX = PermissionsEx.getPermissionManager();
//the first way tested:
String formatPrefix = ownPEX.getUser(sender).getPrefix().toString();
//an other way:
player = ownPEX.getUser(player).getPrefix() + ownPEX.getUser(player).getName() + ownPEX.getUser(player).getSuffix();

when these lines are running, it skip my loop and consider like if there wasn't any code,like a continue tag!
here is the part where my code is:

Code:

String sender = chat.getPlayer().getName();
        String message = chat.getMessage();
        if(playerRPenabled.get(sender)){ //si le mode RP est activé
           
            try
            {
                //mise en forme du message
                //message formatting then :
                String format = chat.getPlayer().getName();
               
                if (isPermissionEXenabled){
                    logger.info("onPlayerChat + permissions EX ok!");
                   
                    //TODO debugger ici! * (start of bugged zone)
//just here, the plugin "jump" the code to ..
 
                    String formatPrefix = ownPEX.getUser(sender).getPrefix().toString();
                    logger.info("getPrefix?");
 
                    int CouleurPrefix = formatPrefix.indexOf("&");//detection de code couleur
                    //si il y a un code de couleur detecté dans le préfixe:
 
                    while (CouleurPrefix != -1){
                        //on recupere le code couleur detecté
                        String CouleurString =  formatPrefix.subSequence(CouleurPrefix, CouleurPrefix+1).toString();
                        //on recupere la couleur liée
                        ChatColor CouleurCode = ChatColor.valueOf( CouleurString );
                        //on l'ajoute à la place du code
                        String[] Prefixes = formatPrefix.split(CouleurString);
                        if (Prefixes.length > 1){
                            formatPrefix = Prefixes[0] + CouleurCode + Prefixes[1];
                        }else if(Prefixes.length == 1){
                            formatPrefix = CouleurCode + Prefixes[0];
                        }else{
                            logger.warning("ERROR WHEN CATCHING PREFIXES");
                        }
                       
                        CouleurPrefix = formatPrefix.indexOf("&"); //retenter la detection
                    }
                           
                    logger.info("FormatPrefix = "+formatPrefix);
                    String formatSuffix = ownPEX.getUser(sender).getSuffix();
                    //idem pour les suffixes.
                   
                   //same than prefixes but with suffixes
                      
                    
                   
                    logger.info("FormatSuffix = "+formatSuffix);
                   
                    format = formatPrefix + format + formatSuffix;
                    logger.info("format = "+format);
                    //TODO fin de zone a debugger (end of bugged zone)
                }
               
                //envoi du message a chaque joueur proche.
               
                //code that send this mail to nearby players
                }   
               
               
                chat.setCancelled(true); //this cancel the general chat sending of this mail to other players to receive this.
            }
            catch (Exception e) {   
               
            }
           
        }else{ //si le mode RP n'est pas activé
//Where the bug make the plugin JUMP to!
            chat.setMessage(message);
        }
       
        return;
    }

 

Did you depend on PEX in your plugin.yml? If not, tag me and I'll explain how.