Im attempting to send 2 SMS. I have a lengthy text set so i know its above 160 characters however it returns a messageId but end recipient doesnt receive it. My string is set as this - is there a problem with this string?

"https://www.intellisoftware.co.uk/smsgateway/sendmsg.aspx?username=uuussseeerrrr&password=password1&to=" & MobileNumber & "&text=" & Message & "&from=COMPANY" & "&UserKey=" & SomeUserKey & "&maxconcat=2"

Could you please send detailed information to help us look into your
issue:

1. Your username on our system
2. Phone number(s) you were sending to
3. The mobile network for each recipient number(s)
4. The time you sent the message(s) (as indicated on the 'SMS Sent'
page)

Please send this information to support@intellisoftware.co.uk