Unable to obtain the list of backup Images using specified search criteria

I found a solution to this issue or it is better to say I found the root cause of this problem.

Because my database has a dot in its name it fails and I checked this by creating two databases with a dot and without the dot. But the question comes to my mind is how can I back up from a database which has a dot in its name? 

Please give me a real solution instead of a change in the database name.

Thanks