somtimes my textures are gone

[RadioHasNoFuture]

Title: somtimes my textures are gone

Version: 3.0.3/3.0.4

OS: Windows XP Build 2600 Service Pack 3

Java Version: 7

Description of Problem:

sometimes the textures of advanced machines arnt there, and it are jusr white blocks.

http://imgur.com/b9iop

the machines are in this order:

electric furnace --> centrifuge extractor --> rotary macerator --> singulary compressor

Error Messages:

n/a

Error Log:

n/a