move apps to 2nd SD card?

hi,

I have 3 storages on my phone.
1- phone storage 500mb
2- internal SD card- 2gb (this SD card is embedded somewhere)
3-external 2nd SD card 16 gb

my phone is rooted and I am able to move any app from phone storage to internal sd card using link2SD app but I would like to remove all to external SD card. It looks like link2SD doesnt recognize this 2nd SD. so how can I do it? what is the best way?

thanks