It looks like you are using some kind of mobile device there...get on a laptop/desktop computer and see if you get information regarding the nature of the error, such as what query is triggering the error, and the MySQL error number, etc. Or check your email to see what kind of errors are being sent.
I am going to report your post to ask one of our moderators/administrators to move this thread to the vB 4.x area.
Thanks for your support, error is resolved now i just do the following steps
I run Maintenance > Repair/Optimize on searchcore table from ACP. I done it two times until it says OK.