CD-RW Backup Problems

I’m new to CD-R and CD-RW technology and am having problems backing up to CD-RW discs. CD-R’s do not appear to present a problem.
The copying seems to hang when it encounters .tif files and a ctrl-alt-del is the only way out.
I’m using TDK CD-RW 700MB discs on a win98se platform.
Can anybody help?:confused: