It downloads OK. It just doesn't open under WinXP because the unique font identifier is missing. An omission of the one (Manfred Albracht) who converted COMSC___.PFB/PFM to CommScriptTT.ttf to show us the conversion quality of his conversion program Type-Designer 2.0.
As you have found out, that conversion did not turn out that good after all. And apart from the missing unique font identifier you may also have noticed that many letters are cut off at the bottom. Another Type-Designer 2.0 fault.
I'd go for the real one and forget about this crippled thingie.