[Trisquel-users] Can't boot Vista after Trisquel install

[newellrp1]

Hello,
I had a Windows Vista install on my laptop on the first partition (50GB).  
Then I installed trisquel. Now when I try to boot it from trisquel it asks  
for a user name and password. I input the username and password (for  
trisquel) and it dumps me back at the grub menu. Very frustrating. Any ideas  
on how to fix?