EBS - MT940 - Auto Clearing with payment document number

Hi

I am getting the MT940 bank statement with the payment document number alongwith company code and year at line 86.  For example:

900012345678902014?21

9000 - company code

1234567890 - Payment document number

2014 - Year

?21 - Not sure

I created a new search string as below:

( |^)#####################( |$)

At tag, I left only the 10 digits for the document number and removed the other values ie for company code, year etc

Assigned this search string for the bank account with interpretation algorithm 020 (document number search)and target field is Note to payee.

But, the system is not able to clear by looking at the payment document. Instead, it is trying to clear with the amount.

Could you please suggest me on this.

Thanks and Regards

Ashok