MAX IF AND with criteria ??

Hi all,

I'm having a few issues with the attached spreadsheet, if anyone can assist

I'm trying to get the MAX and MIN movement from a dated range, by doing the following;
for example; the movement between 2 dates i.e. weekly and 2 weekly movement

I'm using the follwing formula- MAX(IF(AND(B2:AA2>B2,B2:AA2<=H2),B13:FZ13))

so the MAX which is greater than 1 Jan 07 but less than 7 Jan 07 and same with the MIN.
then the next one would be between 7 Jan and 14 Jan and so on.. and then for 2 weekly
between 1 Jan & 14 Jan....

Can anyone steer me in the right direction as to why it doesn't work or a more efficient
way to work this out ?

Thanks