in WUI.
Generally Release date configuration happens with a tolerance. It seems like immediately you are trying to generate the order, for that your condition should met. Just play with the dates.
You manually change the dates until you get the release date less than or equal to today, then try.
For an example you can see before and after adjustments.
or
in GUI.
open the contract (tcode CRMD_ORDER) in change mode and get into the PRODUCTS tab, double click on the item and go to ACTIONS tab and you can edit the condition values you are passing, for this you might need to know how to dig into the business object. change the date values and Then execute the action button available just above on the same tab.
regards
Sridhar