mwm,
Ok there's your problem then.
The other problem I always seemed to have was getting band on quick enough before the erection lost some of it's firmness.
The ring goes over the tube. Before you start pumping. Actually TWO rings. Then when all pumped up you SNNNNAAAPP them buggers onto your bugger befor removing the tube. It'll hurt, but MAN UP and do it.
However, trying to get them silicone rings over the pump tube will be tough as they don't stretch much. Osbon are stretchier. I can get them over a 2" ID tube -- which is 2.25" OD at least just using my fingers. But I am an expert from years of practice. If your pump came with a cone loader you should be able to get the medium and larger silicone rings on the tube. I dunno about the tiny diameter silicone one -- but I would never want that snapped on willie -- would probably bite it off like slicing salami.
ALso the velcro was only to assist with Injection erections. If your injection only gives you say, 80% .. adding the velcro snugged on at the base can then boost it to 100% by preventing outflow (which is near the surface of penis) but still allowing inflow - which is deep -- in the CC's really. Another booster is to use Island Rings (one at base, and one just under glans). You can get em on Amazon etc. But they break fairly easy. I have to find something a little stronger.
OK .. go get the good rings and try again.
J