Last Friday, as you noticed, they only new episode they aired is episode 45... and just last Friday (Sorry guys, I am late in this update because I am not online!), they made this official statement:
Mga Kapatid, Humihingi po muli kami ng dispensya. Pansamantalang mapuputol ang pagpapalabas ng mga bagong episodes ng FULLMETAL ALCHEMIST: Brotherhood. Pero babalik po ulit sa Episode 01 ang programa, simula sa Biyernes.
We hope we resume the programming as soon as possible, at Maraming Salamat sa inyong Pag-unawa.
Translation: For our TV5 viewers, we apologize that we will not air new episodes of FULLMETAL ALCHEMIST: Brotherhood. But we will return to the 1st episode of the program, starting this Friday.
We hope we resume the programming as soon as possible, and thank you for your understanding.
My theory for this move? The other episodes are not yet dubbed... or they haven't purchased it. But hey, at least to those who haven't started yet with FMA: B, they have time to catch up.