SRL Archive - OSR Help

I have started making a script, however i keep getting the following error:
Exception: Range check error at line 43

I have worked out that if i reselect the runescape client window it works again for 2 seconds then it resets itself, how can i fix this please :)

This should be in the scripting help section next time. ;)

Also, post your code!

Moved ;)