I don´t have access to data base

Question

 hi, 

 

I'm trying to get access with "user b" to a Sql Server Data Base whitch it was created by "user a".

 

I got this error:

 

 

I otrher words i mean i cannot access to "1RQ_BPCSQL1" Data Base whitch was created by other person with another Windows session..

 

Where i have to change the right permittion to be able to use that Data Base??

 

Thanks.