Need help with my design please

[Colum]

Hello people,
I made this design for this (http://www.halloweencostumecastle.com) site along time ago, which was easy for me as this is my style.

As you can assume i'm not a professional designer and not even close, and this is why I'm asking for your help:
Lately I was asked to make the design for this site with deals with serviced apartment (Knightsbridge) (http://www.greenwoodasset.co.uk), and I really don't know if its good enough.



Any idea/tip will be welcomed!

[Snookerman]

Try validating your code (http://validator.w3.org/check?uri=http%3A%2F%2Fwww.greenwoodasset.co.uk%2F&charset=(detect+automatically)&doctype=HTML+4.01+Strict&group=0&verbose=1&user-agent=W3C_Validator%2F1.606) for cross-browser compatibility and try not to use tables for layout (http://hotdesign.com/seybold/everything.html).
Regarding the design, I think the light green makes the design look unprofessional and it's tough on the eyes.

Good luck!