selectWindow Could not find window with title

The following snippet of script runs manually (step by step, using "X") but fails when trying to run at once or when using the pause > step. The failure occurs at selectWindow.

clickAndWait css=input[type="submit"]
pause 5100
selectWindow title=XYZ Billing Report
windowFocus
verifyTextPresent Account Number

The script for the window is:

// function redirect(target, url){
if (target =='_blank'){
open(url);
}
else if (target == '_top'){
window.top.location.href=url;
}
else if (target == '_parent'){
location.href=url;
}
else if (target == '_self'){
location.href =url;
}
else{
open(url);
}
}
//]]>


So I don't see where I can use a name or var. Very odd behavior that this will work one way, but not another.