I have old system is foxpro and i would like to integrate product, account and contact into CRM.I know a bit about SSIS. Plese suggestion other solution . Thanks in advance
More details - CRM 4.0 - SQL 2005
If you know SSIS you can use SSIS Web service tasks to interact with CRM for integration purposes.
Check out the SDK to learn more about CRM 4.0 web service messages.
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=82e632a7-faf9-41e0-8ec1-a2662aae9dfb&displaylang=en
Otherwise you can use .NET to also work with the web services and also any other FoxPro API that exists.