Make sure the working directories in manager of the .bin AND the .cfg files both point to the folder containing all the necessery files.
Within the folder you also must have a file named bin.cfg (a text file named bin.cfg) which contents looks like this:
#type,version,file,description,hyperlink,reboot timeout (ms)
CYBERGEAR GOLD,,nagold.bin,,
ARGENT OFFICE,,naoffice.bin,,
ARGENT BRANCH,,nabranch.bin,,
ARGENT ULTIMA,,ip401.bin,,
ARGENT PREMISYS,,ip403.bin,,
ANALOGUE POTS8,,napots16.bin,,
ANALOGUE POTS16,,napots16.bin,,
ANALOGUE POTS30,,napots16.bin,,
ANALOG POTS8+,,avpots16.bin,,
ANALOG POTS16+,,avpots16.bin,,
ANALOG POTS30+,,avpots16.bin,,
ANALOG POTS8V2,,dvppots.bin,,
ANALOG POTS16V2,,dvppots.bin,,
ANALOG POTS30V2,,dvppots.bin,,
DIGITAL S0x8,,nas0-16.bin,,
DIGITAL S0x16,,nas0-16.bin,,
WAN3,,nawan3.bin,,
ARGENT WAN3,,nawan3.bin,,
DIGITAL DTx8,,naDT-16.bin,,
DIGITAL DTx16,,naDT-16.bin,,
DIGITAL DTx30,,naDT-16.bin,,
MEDIA GATEWAY,,ip9000.bin,,
BT FUSION LITE,,nagold.bin,,
BT FUSION,,naoffice.bin,,
BT FUSION PLUS,,nabranch.bin,,
INDEX IPNC,,nadrcii.bin,,
OFFICE GATE,,nabranch.bin,,
DIG DCPx8,,nadcp-16.bin,,
DIG DCPx16,,nadcp-16.bin,,
DIG DCPx30,,nadcp-16.bin,,
DIG DCPx16 V2,,nadcpV2.bin,,
DIG DCPx30 V2,,nadcpV2.bin,,
DIG ADPx16 RJ45B,,dsaupnV1.bin,,
DIG ADPx30 RJ45B,,dsaupnV1.bin,,
DIG ADPx16 RJ45B BST,,nadcpaV2.bin,,
DIG ADPx30 RJ45B BST,,nadcpaV2.bin,,
DIG ADPx16 RJ45,,nadcpaV1.bin,,
DIG ADPx30 RJ45,,nadcpaV1.bin,,
DIG ADPx16 RJ21,,nadcpaV1.bin,,
DIG ADPx30 RJ21,,nadcpaV1.bin,,
ANALOGUE POTS8+,,avpots16.bin,IP 400 Series POTS (8) Module,
ANALOGUE POTS16+,,avpots16.bin,IP 400 Series POTS (16) Module,
ANALOGUE POTS30+,,avpots16.bin,IP 400 Series POTS (30) Module,
ANALOGUE ATM16,,naatm16.bin,IP 400 Series ATM (16) Module,
IP 401,,ip401.bin,IP 401/IP 401E System,
IP 403,,ip403.bin,IP 403 System,
IP 406,,ip406.bin,IP 406 System,
IP 412,,ip412.bin,IP 412 System,
IP WAN3,,ipwan3.bin,IP WAN3 System,
IP 406 DT,,ip406u.bin,IP 406 System,
IP 406 DS,,ip406u.bin,IP 406 System,
IP 401 NG,,ip401ng.bin,IP 401NG System,
Small Office,,ip401ng.bin,Small Office System,
IP 408,,ip408.bin,IP 408 System,
IP 500,,ip500.bin,IP 500 System,
IP 500 V2,,ip500v2.bin,IP 500 V2 System,
TrialTime,300