Question : isapi rewrite - helicon

I have my httpd.ini with following rules:

[ISAPI_Rewrite]
RewriteCond Host: (?:www\.)mysite.com
RewriteRule (.*) $1 [I,O,L]

RewriteCond Host: (.*)\.mysite.com
RewriteRule (.*) $2\?account=$1 [I,O,L]


------------

when user enter subdomain1.mysite.com/page.aspx, I expect
to have

mysite.com/page.aspx?account=subdomain1

it is working fine and I'm happy!

the problem is happening when user browser navigates to
follwoing url:

subdomain1.mysite.com/page.aspx?somedata=someinfo

and the filter is rewriting to:

mysite.com/page.aspx?somedata=someinfo?account=subdomain1

when the correct should be

mysite.com/page.aspx?somedata=someinfo&account=subdomain1

is there any solution for this problem??

Answer : isapi rewrite - helicon

Open .ini file

add the following line

RewriteRule ^/([^/]+)/([^/]+)$   /sendmail.aspx?somedata=$1&account=$2 [I] [L]