IrDA very slow

I have internet connection that needs irda, and it can download only 1kB/s (Normal 4-5kB/s),
Is there "Fast irda protocol" (or something like that ) in kernel? It made debians net slow also.
I don't have the newest version (from beginnig of the year). If bug is fixed how can I update it without downloadin everything again?

I mean, it is slow if Fast Irda isn't in kernel