Hi,
You can try to recover the firmware. from cisco.com. Download the firmware that you have present on the device. If you didn't notice the firmware version, download the latest firmware.
You may find the procedure in the end of the release notes. It is called "Firmware Recover Steps Using TFTP":
http://www.cisco.com/c/dam/en/us/td/docs/routers/csbr/rv320/release_notes/rv32x_relnote_v1_1_1_19.pdf
Hereby the same procedure but using a tftpd32 software:
http://sbkb.cisco.com/CiscoSB/ukp.aspx?vw=1&docid=0be53470450c4b42967d61b89ea4d00f_RV320_Router_inaccessible_after_firmware_upgrade.xml&pid=2&respid=0&snid=3&dispid=0&cpage=search
Regards,
Kremena