Is my Untiy3D or monodevelop problem?

Iam poor in english,It is not my native language.
I’m running Unity 3.0of5 with MonoDevelop 2.4 on WINXP
my problem is that:
I’ve noticed that adding a javascript on Unity side and then double-clicking that file will bring up MD properly but then hang/crash it.
i have set steps to keep them Synchronous .

Thank you

Be sure that you set unity to use the mono launcher that is included in same folder that unity is installed to. Unity can not use the launcher that is made when you install mono separately. For me the special launcher is in: “C:\Program Files\Unity\MonoDevelop\bin\MonoDevelop.exe”