Question about windows movie maker

I made a movie today and it will not save no matter what i do all the source files are wmv and audio is mp3..I done one last week and was no problem but this will not save anybody else have problems with this programme or is there any way i can save this now..i dont want to spend another 3 hours making this
Answer #1
do you get any errors? if you do what do they say?
Answer #2
Yep the error says verify original source files are available Verify the saving location is still available
Check that there is enough disc space
All of the above are ok from me so not sure what the prob is
Answer #3
Moving -
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