IBM is trying to succeed in the less familiar terrain of <A HREF="http://www.newsfactor.com/story.xhtml?story_id=57371">network and desktop security</A>--and finding that a few high-profile moves aren't enough to sway some skeptical analysts.

When IBM acquired Internet Security Systems a year ago, the industry's mixed reaction included that of Gartner security analyst John Pescatore, who said it doesn't "make sense for IBM to own network-security products."