url encoding qr barcode

Question

i'm creating a qr barcode testing a website

http://test.com/test/ctrl/emain.asp?ctrlnumber=BAAAMYINQ

when creating a qr barcode the website must be url encoded so I change it to

http://test.com/test/ctrl/emain.asp%3Fctrlnumber%3DBAAAMYINQ

when I do this the website no longers works?