Hi, first, Happy New Year to all of you, and thanks again for your help
here's my config: Win7 , 16 Go ram, UA-25Ex audio interface, Sonar 8.5 producer
everything works fine with my sonar except , when i want to select v-vocal, sonar crash , the same thing with the Fx dynamic processor and all Fx effects if i want to insert, and click one of them , sonar freeze , i use these effects with guitars , and i really need them , so , according to you , is there a way to fix the problem without to have to re-install sonar ?
Thank You very much for reading me, and hope to find a solution
have a good day 

To start with some basic info:
Are you using 64 bit Windows and have you installed the 64 bit version of SONAR?
Are you using the latest ASIO drivers for your audio interface?

Hi, thanks for your reply, first i have win 7 x64 and  my sonar is the x64 version , and i have the latest driver for my interface UA25-EX , everything else works fine except v-vocal and the audio direct X ,  Fx suite compressor gate end expander
hope this can help a little more
Thank's again
 

Hi, finally i fixed he problem,  new installation and everything works fine and no more crashes
Thank's