My Z5 compactwill not send photos as attachments using gmail which it has done in the past

[AC Question]

I use Gmail for all emailing etc and have often attached a photo file to an email. Not sure what they were but now they are all JPG
I can send using tx and attaching or messaging on face book but that is no good for those who do not have it. Seems I must have changed a setting or something, any suggestions?
Ordinary emails go through no probs.
Thanks