Muxing MKV+SRT with MKVToolnix (MKVMerge) = bad subs

[frosse]

When I try to mux an MKV file with an SRT with MKVToolnix (MKVMerge) the subtitle added flips out and only displays like 2 letters per line or so, what am I doing wrong?

My steps:
Open MKVMerge
Load MKV-file
Load SRT-file
Press 'Start Muxing'
Play file in VLC

Result = Bad text/incomplete text

Plus it leaves me with an MKA instead of MKV, is that anything to worry about? Should I like change any settings to make the sub work?

There's nothing wrong with the srt-file since I can load it properly in VLC.

Help appreciated

Edit: And yeah, I'm on OS X 10.5.2

[frosse]

Any1? There has to be some1 who has muxed an MKV with an SRT before?!

[Delta2]

Instead of SRT, try to use advanced substation alpha format - ASS

[terryj]

Any1? There has to be some1 who has muxed an MKV with an SRT before?!

no, usually we go the other way, Mkv w/subs--> DVD.