"Error: PRIMARY filegroup is full" indicates that the database is full. To eliminate the error there are one of two possible solutions:
1. Delete any unneeded data from the database to make room for any new data
2. Increase the size of the database to accomodate new data.
If you wish to delete data, you can use the SQL DELETE command with tools such as Enterprise Manager or Query Analyzer.
If you wish to increase the size of the database, you can upgrade to a larger plan or purchase optional extra disk space. Please enter your request via the Alentus Support Center.