Android :: Upload File To Some Url Using Ssl

I am trying to upload a file to some url using ssl.

I use this code to set trust manager -

CODE:........

And this one to set host name verifier -

CODE:.........

Then i am opening connection like this -

CODE:......

After i get the connection i use it to upload the data. Is i use http everything is ok but when i try https i get the following exception -

CODE:........

The strange thing is that i don't get exception all the time. When i try to upload small files (200K) it's working O.K. or it's crashing very rare but when i try to upload bigger ones (more than 1MB) i get the exception almost every time.