You need to explain the problem thoroughly,

You can read an excellent article about it here: Why software builds fail | ITworld

Or read The Daily WTF: Curious Perversions in Information Technology and be suprised that there is any software slightly working at all.

cheers
Mike

dear witch software is builds fail can you enplane it .

Obviously the question is very general, but dependency problems are one common reason for software builds to fail.

Some more reasons are:
- Feature Creep
- Moving Requirements
- Politics
- More Dev's makes projects slower (each member doubles the possible communication channels)
- Cutting corners for short term victories
- no docu
- no testing/verification while development (TDD)
- personal flavor
Do you need more reasons?
Mike

maybe the software has not been programmed with thought and not tested well on various devices. but there are 10000 reasons why!

Do you not think these type of questions are just here to garner post counts ?

They are very vague questions and most of which can be learned by a simple google search