I use BIS and got Ramble to work.
I used the apn found on here, I guess you too have it already.
password: ****** (they are all stars i can't see, lol, but you can find them on this forum)
anyway, remember to put username and password in CAPITAL letters.
since it works on mine, at least u know it's not a device-specific issue.
Edit: Why is there a BOX?? around my text?
Edit 2: Wow it appears to be an image! I guess the forum recognizes it as an email address (though it's not) and convert it to an image so bot will not be able to collect them? How thoughtful...