Product allocation is not working after setting all required config!

Hello SD gurus,  Would you please help me to resolve this issue?

I followed and configured all the required steps for product allocation  in ECC 6.0 Version still  the product allocation is not working as expected.

Here are the steps performed

1. Created procedure through OV1Z

Maintained  Product allocation procedure

1. T.code OV1Z
2. 2.  Maintain product allocation object

Transaction code: OV2Z

1. 3.   Create required info structure as per requirement
2. T.code MC21
3. 4.Specify Hierarchy and Define the “Product allocation planning structure”

Transaction code: OV3Z

1. 5.Define Consumption periods

1. 6. Control product allocation

1. T. code: OV4Z

Selected the product allocation procedure and given the required

criteria and assigned to Info. Structure S991.

Activated ‘Requirement category’ for product allocation

1. 8. T.code OVZ0

Activate schedule line category for product allocation

S991 Info structure Planning parameters updated

Mc7F

Create update

1. T.code MC24

Activate the update

1. T.code OMO1

Create planning Hierarchy

1. T.code: MC61/62

Maintain planning type

1. T.Code: MC8A/B

Create the product allocation plan for required quantity

MC94

IN spite

of reserving stock as shown against the product allocation

material specific and customer specific product allocation is not

worked and it allocated stock to sold to party 136

Available stock is 200 EA in plant 1101 with the particular batch

the stock is 100 ea