Good morning people: running str

[coldbohemia]

Good morning people:
running strawberry perl script on windows 7 64 bit from padre editor

my first perl script reads a text file and looks for a certain value within same
this works:
while (<$wsls_stormast>)

when i try to test for multiple conditions in the while loop,
the loop doesn't execute
this statement is ignored:
while (<$wsls_stormast> && !$script001::foundstore)

I'm declaring foundstore in package script001
$script001::foundstore="";
it has the empty string, which i thought would test false in the while statement

is there something wrong with my syntax?
i don't get an error when i execute the script

Thanks..