Pricing problem in Invoice

Hi,

We are facing a problem with an Invoice which is described below:

Pricing Conditions for Rebate is being picked up for pricing in the order but then the same conditions are not picked in the invoice generated on the next day.

The pricing condition is valid for all the days of the different life cycles. When we check the condition analysis for the invoice it says that the condition record is found but not set.

Also the item detail specifies that no manual price change has been carried out.

Please let me know what all may be the reasons for this.