Error loading map

I downloaded a map from FPSbanana called DM_phazon_b1 to use in Garry’s mod, but when I try to load the map, the loading screen freezes at the point where it says “loading resources…” Does anyone have an idea to what’s going on?

I know it’s a map for HL2: Deathmatch, but other custom DM maps work fine.

have you tried loading it in Hl2:DM?

It works fine in Deathmatch.