if you only had 256mb , sgm180 probably wouldn't have worked.
SGM180 is a 180mb soundfont. I was able to run it on my 512mb laptop
Meanwhile , why don't you try downloading sgm128 it's 128mb.
By your earlier post, it sounded like you were low on memory. I bought 512MB for $60, to add to my 256MB. We'll see today if that was the problem.
SX900, P121 Piano, Band in a Box 2020
V Arranger/Ketron SD2