Do you have the option of backing up the database to a file on the local system and then copying the file across? This would ensure, regardless of network problems, you always get your backup.
K. Brian Kelley, GSEC
http://www.truthsolutions.com/
Author: Start to Finish Guide to SQL Server Performance Monitoring
http://www.netimpress.com/
K. Brian Kelley
@kbriankelley