Token generator

Yesterday I worked on a simple token generator, setup a php page on my server for store the token into a database (the page works well I’ve already tested it) but when I run the app into editor or into my android device today the token generator don’'t send data to my server (i’ve already installed VaRest), but the thing more strange is the first launch of my token generator made yesterday in an mobile preview worked well subsequent time (today) it never worked.

what could be the problem?