some trouble after upgrade

Hello to the Dolphin community, and please first excuse for my english, i'm a poor long french guy.... So i made a free community site for my friends and everything was ok with 6.1.2, the design, the system, the Ray chat. After a problem with the database (it seems to be that i have doubble in this and i don't clear it enought, so i'll going to do this quickly, cause my site is out since the saturday 2pm to monday 10am every week), so i reload the site and done a new installation. After this, the page in admin part for "fields buider" is out, always "loading", and this since i update to 6.1.3 and 6.1.4. And now after update to 6.1.5, the A/V chat is working (without video cause of i don't have a RMS serveur), but the instant messangerie is still loading. The other thing i notice is that the web presence got some trouble, don't display people who are "logged" and display people who aren't.....   If anyone got answer or a way i could try, thanks a lot....  DOLPHIN is realy great and wonderfull, i waiting strongly the Seven version..... (not waiting for W..... Seven ;-) )