Phone number +639---------cannot receive SMS messages at this time.?

Phone number +639- - - - - - - - -cannot receive SMS messages at this time. i get this message evert time i try to send a sms but it alway say that this is a philippine number so it has a +then 639 then 9 other numbers so i put the number then it opens then i put my message then enter but then it say that phone number +639- - - - - - - - -cannot receive SMS messages at this time.why dos it say that all the time there was only 3 time she got my meege 1 time she got anothe time no say the same can not receive then a nother time she got it like that. but now it say it all the time every time why?!!!! i cant call her it gets too expencive help enny one GRRRRRRRR!!