Error editing/creating this dsn

Hi mi problem is very rare, when I try to create a ds (datasource), the coldfusion administrator return me this error:

Error editing/creating this dsn (MyDsnName)
The value “MyDsnName” cannot be converted to a number

It’s like he is trying to convert the ds name to a number, why?!?!.

the other fields are ok i’m pretty sure about it.

The most rare thing here, it’s that the datasource i am using already exists. i just change the password. but all fields are ok.

thanks in advance