APEX

I have a Page which has Date as LOV with Submit With Select (This is Page 10)
e.g. User selects a date, report is displayed based on date selected. This is done using Select list with Submit. Date is populated using LOV based on query. The default value of date is Maximum of date in on of my date column.
The above think works great. No problem so far.

I want to create calendar view which is another page (This is Page 20) .
Calendar is created using Calendar wizard. In Calendar, I want to link Day to above Page. I can create day link which links back to Page 10 and also report data is displayed based on date selected in Calendar.

Now, the problem: The problem is value of Date field on above page (Page 10) is always set to default value. Although, I have said that default value should only set when session state is NULL.
So my question is why Date (Display value) is not set to value passed from Calendar Page. I have checked Session info and correct value of date is present.
What should I do to correct this problem ?

The other question is :
How to disable calendar day link when there is no data to be displayed ? At present, as soon as I create a Day link, all the Days in Calendar are linked, what I want is, to hightlight/clickable which has only some data.
How should I do this ?


Thanks
Sanjay