ldapsearch with -y option

Hello,

Maybe it's a silly question, but I'm going crazy and I don't found the solution. I want to use the -y option in a ldapsearch command, so I have write my password in a file (plain text file with the password in plain text), then I run the

ldapsearch -y <mypasswordfile> <other options>

and I get an invalid credential error. I have checked several times that the password is correct. I have debuged the request with wireshark and I have checked that the only difference in the bind request is that -y option is adding a final 0x0a char to the password.

Any idea?

PS: if this could help, I'm using ubuntu 12.04 and I have created the password file with vi (I have also tried creating it with gedit and with echo "..." > <file>)