Postgresq 8,1 hangs when running function

Hi guys,
I'm running postgresql 8.1 on a P4 3.0GHz,480 MB RAM, 160GB SCSI hard drive
on Windows XP. Postgres has been crashing when I have tried testing my
reports function, which i leads me to believe it is something in the
function because doing normal select statements works fine. Can anyone check
my code before I ask my boss if I could restart the server, as a restart
means 20 mins work lost for employees? Just for reference, tblnewbusiness
containts just under 8,000 records,

Cheers,
Ben

Any recommendations are welcome to sort this problem out.