Where is my error in order entry code?

The below code produces an error in firefox stating the problem of not finding the website. Other than my censored id and password, which appears correctly in the code, what’s wrong with this order such that it doesn’t successfully send an order?

ShellExecute(0, ‘open’, ‘http://www.collective2. com/cgi-perl/signal. mpl?cmd=signal&systemid=censored&pw=censored&instrument=future&action=STO&quant=1&symbol=ESU1&duration=GTC’,nil,nil, 1) ;


notice the @ sign

Symbols are here: