wifi sync not working/ unable to identify each other device via wifi

view full story

http://forums.androidcentral.com – Hi, I recently bought Galaxy S3 as my first Android phone. Then I first start to care about WiFi sync as it's so convenience. Please help me as I've tried all attempt and unable to identify what's the problem - I used iSyncr & WiFi File transfer Pro to transfer file - I start above sync App in Galaxy S3, device can be identified and Sync work just fine - After a while, or could be days, or maybe after a huge file sync, I no longer found my Galaxy S3 via WiFi from other device. it just won't show up - turn Wifi Off/on, restart Galaxy, restart PC won't help - Internet connection (HowTos)