This error / bug was reported by a member of this community regarding groups.

When you go to a group
Such as:
http://www.yoursite.com/groups/entry/Name-Of-Group

then click on "view all members"

On a page like this for example:(replace yoursite.com with your actual site and the ID=2 with the number of your group.)
http://yoursite.com/grp.php?action=group_members&ID=2

When you try to click on the next page...ie..."2" "3" "4" etc...etc. nothing happens.

If you experience this problem you can do the following:

First back up yoursite.com/inc/classes/BxDolGroups.php

It's a big file but look for this at or near the halfway point in the file:
if( $iPagesNum > 1 ) {
$sPagesUrl = "{$_SERVER['PHP_SELF']}?action=group_members&{$sEditModeReq}ID={$iGroupID}&page={page}";
$sGenPagination = genPagination( $iPagesNum, $iPage, $sPagesUrl );
}

Change the & part to only & like:
if( $iPagesNum > 1 ) {
$sPagesUrl = "{$_SERVER['PHP_SELF']}?action=group_members&{$sEditModeReq}ID={$iGroupID}&page={page}";
$sGenPagination = genPagination( $iPagesNum, $iPage, $sPagesUrl );
}

There is also a reference to editing for the group that may need a similar change in this file.

Also find this for edit:
<div class="caption_item">
<a href="{$site['url']}{$this->sCurrFile}?action=group_members&amp;mode=edit&amp;ID={$iGroupID}">{$sEditMembC}</a>
</div>

Then change the &amp; part again if necessary like:
<div class="caption_item">
<a href="{$site['url']}{$this->sCurrFile}?action=group_members&mode=edit&ID={$iGroupID}">{$sEditMembC}</a>
</div>

Save the file and re-upload overwriting the original.

Simply refresh the page and not click on "2" "3" or "4" again.

Good Luck!!