Make and model router?
Make and model printer? Did you assign the printer a Static IP address?
Does the following link provide the applicable User Manual for you Vonets VAP11G device?
http://www.vonets.com/download/VAR5G/VONETS Series Product Instruction Guide.pdf
Verify that I found the correct User Manual.
Line diagram:
Router[LAN Port] ------ Ethernet cable --->[Ethernet Port] PC and ~~~~ wireless from router ~~~~~> VAP11G ------cable (?) ------>[printer port ?] Printer
Edit and correct my line diagram as necessary. Show all ports and cables.
What did you do and/or change when you "set it [VAP11G] up using the default settings". What are those default settings?
What IP address are you pinging?
On your computer run "ipconfig /all" (without quotes) and post the results.