Rename 'Network 2' as 'Network 1'?
Check/Play around with 'Private/Public Network' and your File & Print Sharing settings.
Really a Windows query but change of router resulted in a new SSID and therefore Network. Presume this is all wireless.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC