Idoc segment field is not declared.

Hello Experts,

I have created segment "ZSEG25" which contains one of the fields as Long_Byte with Data element "ATPSBDATA" ( type LRAW length 356 ). And used this segment in idoc "ZCUSIDOC_1" .

While trying to import this idoc into .net application thru UI import, it gives following error :

" Type 'http://ZCUSIDOC_1.V3:LRAW' is not declared"

Please help me.....