Accounting Document not cleared while billing

Hi Experts,

I am not an abaper!

I tried creating a sales order (sold to party is taiwan)  Had a credit hold , Released it , created delivery ,

Performed PGI, and finally i try to do the billing via VF01.

When i do the billing account docment got generated but says not cleared.....

I find these entries exactly.

cocd   itm       pk       account          amount        profit center     partnerpc         trprt             plant.

131     2        50       501210          1,000.00-      24002     24002          121             2075

131     1         01       12100099          1,000.00                                          121     

I am tryin to understand what went wrong?

Is there some information available from this to find a fix?

regards,

Shawn.