What is wrong with my RewriteRule (Remove a question mark)

What is wrong with my RewiteRule?

RewriteEngine On
RewriteRule ^List/?(.*?)&time=([^&]+) List/$1.php?time=$2

I want to remove question mark(?) after List/ :

http://mydomain.find.com/List/?variableName.php?time=variables

redirect to:

http://mydomain.find.com/List/variableName.php?time=variables

Thanks,
MK

 

change

RewriteRule ^List/?(.*?)&time=([^&]+) List/$1.php?time=$2

to

RewriteRule ^List/(.*?)&time=([^&]+) List/$1.php?time=$2

 

Thanks for your reply.
It did not work.
This is the out put of rewrite log file:
applying pattern '^List/(.*?)&time=([^&]+)' to uri '/List/'

Should not I use RewriteCond %{QUERY_STRING}?
Thanks for your help.

MK