It's possible those devices are using some abnormally high frequency (companies have done that in the past for no good reason - often high-end brands), although the Pronto in particular is a good learner (do make sure you're pointing at the right end - the learning eye is on the bottom, not the front).

Learning remotes don't necessarily have to know anything about what they're learning - they just capture the frequency and series of pulses that they see. The very first learning remote ever made in the mid 80's (GE Control Central) will still learn codes from a modern Blu-ray player using a code format that didn't even exist back then - so long as its frequency is in the ~40kHz "standard range".