Upgraded from SQL 2000 to SQL 2005 and my database application now takes 6 times as long...

I have a software application that uses SQL as its backend database.  I have historically used SQL 2000 and recently upgraded to SQL 2005 because another application I was using demanded the upgrade.  The main application now takes 5-10 times longer to complete the same task as the old SQL version.  Any thoughts?  I am running both SQL and application locally on a Dell laptop with 4 gig of ram.
majervisAsked:
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
did you update the statistics after the upgrade?
can you run the queries in the query window with "include actual execution plan" to see what "happens"?
-> post that picture, please
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majervisAuthor Commented:
sorry...how do I do that? I am new to 2005 and frankly a bit of a novice anyways.
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
update statistics:
http://msdn.microsoft.com/en-us/library/ms187348.aspx 

for the second part, that should be "obvious", in the meaning that you should know how to run some query in the query windows of sql 2005 management studio, and in the Query menu, you find the "include actual execution plan".
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Microsoft SQL Server 2005

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