Buildcraft devices not working

[maniacmusic]

Title: Buildcraft devices not working

Version: 3.0.3/3.0.4

OS: Ubuntu 10.4 LTS (64bit)

Java Version: 7u5

Description of Problem:

Buildcraft blocks can be crafted but quarrys etc. don't do their job. If you place a quarry the frame appears but if you attach motors and power them nothing else happens.

Error Messages:

None

Error Log:

There is this error at start ups... http://pastie.org/4268249

[maniacmusic]

Ok, read a little on the forums and found out that "op [buildcraft]" might fix the problem, and it did. :)