SecureCRT SSH Problem

[lyndhurst]

Hello,

Few days ago i could use my computer using ssh to connect a remote host.but now i'm getting this annoying error.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that the RSA host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
7c:5d:75:93:17:0b:2f:93:f1:01:05:b6:d7:31:14:fb.
Please contact your system administrator.
Add correct host key in /.ssh/known_hosts to get rid of this message.
Offending key in /.ssh/known_hosts:17

i'm really new at this and i need your help. how can i fix this? i barely tried every solution on the internet but no solution. i'm using windows xp by the way.

thank you for interest.