You're right. But that wasn't the problem in this case.
I just reinstalled MDAC and it worked. But I still wonder if what caused the problem was .NET or after I installed SQL client.

I've never used fields more than 10 char long, but is good to know that would be a problem.

Thanks for your answer Bo

>>Everytime now I try to ALTER TABLE I have this message “Invalid operation for the cursor”
>
>In VFP 7 this error can occur if you have a field name over 10 charaters long in your cursor.
>
>This error did not occur in VFP6, but the resulting cursor had its field names truncated.
>
>Hope this helps,
>Bo Durban