Installation of Office 2007 Retail

What is the problem when i in the beginning of the installation gets this error message:
EventType : office12setup P1 : {10120000-0f00-0000-0000–0000000ff1ce}
P2 : 12.0.4518.1014 P3 : x P4 : invalidargument P5 : dw20.exe
P6 : x P7 : x
Thanks for replies