I bought a TL-WA1201 to work as an AP. It's was set up fine and appeared to be working both in 2.4 and 5Ghz.  But not i have many devices connecting to on 2.4 which now say connected by no Internet.  If I take my phone near the TL-WA1201 it's works fine and everything on 5ghz. But when trying to connect using the the 2.4ghz it sometimes connects briefly but and drops or sometimes I can't joint at all and it says connected but no Internet? Any ideas? Thanks