Blocking/ Unblocking Storage Bin

Hi experts,

I have a problem.

I block a storage bin for stock removal via tRFC, My application sends an WMBBIN message-type:

<WMBIID01>
      <E2LBINH SEGMENT="1">
        <LGNUM>CER</LGNUM>
        <LGTYP>001</LGTYP>
        <BLOCK>X</BLOCK>
        <DEBLO/>
        <E2LBINI SEGMENT="2">
          <LGPLA>01-02-05</LGPLA>
          <SKZUA>X</SKZUA>
          <SKZUE/>
          <SKZSI/>
          <SPGRU>1</SPGRU>
        </E2LBINI>
      </E2LBINH>
    </WMBIID01>

Result is correct.

When i try to unblock storage bin my application sends another WMBBIN message-type:

<WMBIID01>
      <E2LBINH SEGMENT="1">
        <LGNUM>CER</LGNUM>
        <LGTYP>001</LGTYP>
        <BLOCK/>
        <DEBLO>X</DEBLO>
        <E2LBINI SEGMENT="2">
          <LGPLA>01-02-05</LGPLA>
          <SKZUA>X</SKZUA>
          <SKZUE/>
          <SKZSI/>
          <SPGRU/>
        </E2LBINI>
      </E2LBINH>
    </WMBIID01>

I see the status od inbound IDoc, this is 51, the message is :

Internal Error occurred during update to LAGP. Contact System supervisor. (Message Number:24, ID: LK).

LAGP is db table that contains Storage Bins.

When i try to unblock storage bin via transaction code LS08, all is correct.

Credential are same..

Where is the problem?

thanks for help.

Regards.

Marco Genova