my weight on road bike wheels

I got my new Claud Butler Elite road bike today and i was a little concerned that everytime i sit on the bike the back wheel goes down slightly. is a the maximum pressure it should be at but concerned that it may affect my performance when i'm riding the bike.......should i be concerned? I weigh in at 16 stone (unfortunately).
thanks
thanks

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I think your wheels will be fine, pop more air in and give it a test! Your weight should not be a hinderance in anyway.
In a word, no.[/u]
I wouldn't recomomend going to far over the max pressures though as I have had a tyre pop after pumping it up to 130 with a 110 max as my pumps pressure gauge was wrong.
Tyres will squish slightly under rider weight at all times and I have seen some websites that twll you what sort of pressures you should be riding with but can't name them unfortunatly.
(Apart from being slow on hills =P )
anyone else get that?
so big lads (I'm just shy of 17 stone) can do themselves a favour in terms of comfort and puncture resistence by running slightly wider tyres. Common sense really but what I learnt is I'm under inflating by a good 10-15psi on the rear tyre which wont be good for the sidewalls.
However, this is on a hybrid, with tyres at 80 psi. When I rode a bike with thin tyres (same weight and overburdened pannier), usually running about 115 psi, I never noticed the back tyre squishing. Squishing is not the right word, is it?