ehcp default page problem in /var/www/new/ ?

Hi, I am new with ehcp. When we installed ehcp in our server, it create a new directory in /var/www/new/.

now our webroot is the /var/www/new/ it is set-up by the ehcp.

my problem now is that our other project were in the /var/www/ cannot be accessed and everytime that I access our domain, it will now go to the ehcp default site, and it cannot go to our old site category.

before we install the ehcp, if we go to our domain.
for example,

www.mydomain.com = it works fine
www.mydomain.com/proj1/ = works fine

after the installation of ehcp:

www.mydomain.com = ehcp default page
www.mudomain.com/proj1/ = not found

Does anyone have an idea about my case?

it will be a great help for me ...

thanks in advance ...