Switch not authenticating

Switch not authenticating

We just installed the software.  All is working well, however I am having an issue getting the swtiches to authentcate when I add them to their apprpriate section.  The switches are discovered as workstation, I then change them to switches.  I am not able to get SSH or telnet to authenticate my credentials.??  I can http to the switch with no issue.  Please help me get these poropelry configured.  The switches are Cisco SLM 2024.

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