MySQL Error!

[Cablink]

Hey there, im having problems that ive never faced before.
I reopened my hotel as it was down for about 1 day, and now I get this:
Warning: mysql_result() [

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]: Unable to jump to row 0 on MySQL result index 9 in C:\xampp\htdocs\includes\classes.php on line 420
I put a new cms, and put the correct stuff in config and it still happens.
if anyone can help me fix this error please do so thanks

 

[Thom]

You need to give us more info, like what are you doing when you experience this error etc..

 

[Cablink]

You need to give us more info, like what are you doing when you experience this error etc..

Not sure, I havent touched anything and I get this.... I tried repairing database aswell, didnt work :/