PuTTY works fine, plink says "Host does not exist"



PuTTY works just fine on my laptop (Win XP, PuTTY 0.60), but plink
always returns:

C:\>plink myhost
Unable to open connection:
Host does not exist
C:\>

I can ping the host just fine and SSH to it with PuTTY:

C:\>ping myhost

Pinging myhost.mydom.dom [10.10.2.18] with 32 bytes of data:

Reply from 10.10.2.18: bytes=32 time<1ms TTL=254
Reply from 10.10.2.18: bytes=32 time<1ms TTL=254
Reply from 10.10.2.18: bytes=32 time<1ms TTL=254
Reply from 10.10.2.18: bytes=32 time<1ms TTL=254

Ping statistics for 10.10.2.18:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\>

Any ideas why this me happening?

Thanks,
Mark
.