Wirelessly posted (iPhone: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_2_1 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5H11 Safari/525.20)
You could always buy tickets for TPA-FLL. They have them for $39 o/w. It kind of defeats the rr tickets but might work.
Or see if you can have a Rez agent add a leg to your PNR for TPA-FLL.
You shouldn't have to try and trade tickets.