I couldnt delete topics over 1000 messages

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   Hi.
I couldnt delete topics that has over 1000 messages. Im getting the error below;

Active Server Pages error 'ASP 0113'

Script timed out

/forum/delete_topic.asp

The maximum amount of time for a script to
execute was exceeded. You can change this limit by specifying a new
value for the property Server.ScriptTimeout or by changing the value in
the IIS administration tools.

How can i delete this "huge" topics?