Fix so i can attach files iPhone

I have today doctogo which I use, its fine but if I need to attach multiple docs i need to exit the mail så I start all pver again, its very frustraiting, i use xperia arc with android and there it works grate. But some times i get low on batteri thats why i have the iphone. I really need you apple to fix this.
TY
MB
own configuration Windows 7 phenom II thuban - 3,8Gghz, 6Gb, x2 xfx 5870 1Gb DDR5, x2 Iph 4, x2 xperia x10