ASP, Excel -Size And Memory

I have an asp page that displays the results in Excel in the browser.
It has about 40 columns and sometimes records can grow upto 1100.

For small number of records I do not get any error messages or displays
the result in Excel format properly. But for the higher number of
records even if the program runs for all day it hangs up and shows
nothing.

In the asp program I have many if and then statement as well as big
loop.

My question is how can I solve this problem? Do I have to look into the
web server memory and other configuration settings? Or is there a
maximum size limit in Excel.

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----------------------------------
sub useObject (flag, byRef obj1)
....
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