Thank you Guy for the complete answer.

Alex

>>As you know there is a huge difference in price between these versions. What are the advantages of Enterprise Developer?
>>
>>TIA,
>>
>>Alex
>
>
>Check this page that compare the features of each version:
>http://msdn.microsoft.com/vstudio/prodinfo/purchase/features.asp
>
>Regarding prices, you may be eligible for an upgrade price. Check this :
>http://msdn.microsoft.com/vstudio/prodinfo/purchase/pricing.asp
>
>You may also take a look at the MSDN subscriptions that are now aligned with the VS.Net versions:
>http://msdn.microsoft.com/subscriptions/prodinfo/levels.asp
>http://msdn.microsoft.com/subscriptions/prodinfo/pricing.asp