How can I retrieve more than 50 Autoscaling Groups via Python Boto

Hello and thanks in advance for any help...

I am trying to use boto to retrieve a list of all Autoscaling groups in my account. I have 164 Autoscaling Groups but the boto script is only retrieving the first 50 in similar fashion to the console.

    #!/usr/bin/python

    from boto.ec2.autoscale import AutoScaleConnection
    conn = AutoScaleConnection('ABCDEFGHIJKLMNOPQRS', 'TUVWXYZ/ABCDEFGHIJKLMN')

    agroups = conn.get_all_groups()
    print agroups

Any ideas as to how I can pull the entire list of my AS groups?