The Material xxx does not exist or is not activated when LSMW Upload Purchase Order (PO)

Dear All SAP Experts,

I'm facing an issue when i do LSMW about Purchase Order (PO). When i'm arrive final step (Start Direct Input Program) and execute, SAP show error message : "The Material xxx does not exist or is not activated".

When i check at MM03, this material is OK. OK is means the material place in right plant, no deletion flag, and i try to create PO with the material, and SAP create PO number for this transaction and it's mean the material is OK, right?

So, what should i check again?

Oh..ya..i use Standard Batch/Direct Input in Object Attributes (LSMW) :

Object : 0085 - Purchase Order

Method : 0001 - Purchase Order

Program Name : RM06EEI0

Program Type : D - Direct Input

I enclose attachment that shown the error message.

Please give me some hint here, so this LSMW upload Purchase Order can running well. Really appreciate with any information/helps.

Thanks & Regards,

Haidi