I think it depends on the company that issued your credit card. I remember trying to use a visa card that was issued by RBC and it was rejected, while my TD visa goes through. It is dependent on the issuing bank's policy.
Thats strange, since they are probably both labelled gambling sites. Either way, the best way to transfer funds in and out of poker sites is with Neteller. Create an account, either deposit into Party with your Visa, and then cash out from Party to Neteller, followed by using Neteller to fund your Stars account, or you can try depositing to your Neteller account with your Visa directly.
Comments