k2 content uploader doesn't work

in deal plaza theme, i setted poplogin and k2 login and they give me many problem:

poplogin: seted in 3b cell mobile version take issues

k2 login: doesn't work the upload content for k2 users (i want registered users can upload their deal).

the website is www.secondachance.com/site

i've installed joomla login and works normally but i need different.
Now doesn't work the nivo slider.......

Hello

can you setting them up so we can take a look? now, it's only poplogin in there so we can't see any issue...

setted ! waiting yours

Hi sorrentino, Sorry for delay in responding due to weekend offline. Regarding the problem, can you tell me how to reproduce the problem? Your website looks fine at my end.

I submitted the admin account informations, try to login and submit an article from the frontend. Then try to connect by a smartphone.