Loading 0MAT_UNIT from 0MAT_UNIT_ATTR

Hello, I am loading master data from 0MAT_UNIT_ATTR to 0MAT_UNIT infoobject. I am getting strange values in BW.For example:

DATASOURCE- 0MAT_UNIT_ATTR ( R/3)

Mat UOM

123 EA

123 P02

124 CSE

124 P04

125 PAL

125 P06

Infoobject- 0MAT_UNIT ( BW)

Mat UOM

123 EA

123 ******

124 CSE

124 ******

125 PAL

125 ******

Can somebody explain why this is happning?

Points will be assigned to correct answers.

Thanks/ Harry