Norton Ghost hangs when nearly complete.

I am using Norton Ghost v 15.0, Norton 360 v 6.0, I am running WinXP, Processor Intel Dual core 4400 @ 2.00 GHz I have 2 Gb RAM.  My HDD is 500Gb, and is partitioned into 12 partitions.  I backup to an external HDD of 640Gb using Norton Ghost.  I have it set to do a daily backup of all drives, but it gets part way through and it shows "Creating Recovery point Photos (I:\) to R:\ours_I_Drive075.v2i"  "Progress and performance 95%"  This %age did not change after 30 minutes.  On another occasion it was the same next morning after about 10 hours!  can anyone help?

 

Brucejm