[Print detaches from table in Ultimaker 2 GO :(]

Thanks everyone for answer!

Releveling the bed helped and now print stick very well.

Have a nice print!

[Print detaches from table in Ultimaker 2 GO :(]

Hi everyone!

Greetings from Poland!

I have problem with my new UM 2 GO. :(

When I try to print things which don't have too big area 'connected' with the table at their first layers

after some time of print they just detach from table and I have to abort the print....

I tried to print on blue tape, on glass with glue ( both things from original package get from Ultimaker ),

I changed speed ( print first layer without fan and VERY slow, but it stil doesn't help! :(

For example - I can't print this model:

http://www.thingiverse.com/thing:257911

Could somebody tell me please what I'm doing wrong...?