L4D2 Hammer editior is crashing. couldn't find custom font file "resource/HALFLIFE2.ttf" problem

[wjddbtjr8707]

When I startup L4D2 Hammer editior. It Crashed :( Hammer editior says 'Couldn't find custom font file 'resource/HALFLIFE2.ttf' I tried 'Verify Integrity of Tool Cache' on L4D2 game and L4D2 Authoring Tools. but still not working.. I have no idea how to fix this.. Please help me

http://youtu.be/FDf1U_fjCmY

[ドンドンドンキ]

Same Problem Here.
Cannot Start Hammer...... When it start, it keeps loading and show up the same sentence, then whole thing crash.

Still cannot find a solution, I tried Google so had!