[Shop is having problems?]

Hi I have been trying for 2 days to make a purchase on muse.mu Store and i cant, when I finished to fill all my credit card info and I hit proceed button the page tell me that my order failed

 

I'm from Mexico and I'm using a Mexican visa credit card and it has no credit limit and I had used it in all the world and to make purchases online, so my credit card hasn't any problem, so what's happening ?

 

Please help me cuz I really want to make the purchase

 

Thanks a lot