Looking to use a VF page to display as a select list all profiles on the org and allow them to be selected into a custom object.

The display of profile all works fine, however when i try to add the value:

jProfile, it returns nothing.

selectedProfilesit returns Null.

Any suggestions as to where i am going wrong? Thanks

VF

    <apex:pageBlock id="block">
    <apex:pageMessages />          
        <apex:pageBlockSection title="Add Rule" id="section1">
            <apex:pageBlockSectionItem id="selProfile">
                <apex:outputLabel value="Profile"/>
                <apex:selectList value="{!selectedProfiles}" size="1" id="ProfilesSelect">
                <apex:selectOptions value="{!Profiles}"/>
                </apex:selectList>
            </apex:pageBlockSectionItem>  

        <apex:commandButton value="Create New Rule" action="{!addRule}" reRender="block" immediate="true">
        <apex:param name="jmProfile" value="{!selectedProfiles}" assignTo="{!jProfile}"/>
        </apex:commandButton> 

 Controller

    private List<SelectOption> Profiles;
    
    public List<String> selectedProfiles {get; set;}
    public String jProfile {get;set;} 
    
    public List<SelectOption> getProfiles() {
      Profiles = new List<SelectOption>();
      Profiles.add(new SelectOption('None', 'None'));
      for (Profile rt : [Select Id, Name 
                            From Profile 
                            Order By Name ASC]) {                 
        Profiles.add(new SelectOption(rt.Name, rt.Name));
      }
      return Profiles;
    }