Paralleling power supplies for higher current
Unless the documentation specifically says this is allowable, you should not parallel supplies (and if it is allowed, be sure to follow all the related recommendations from the manufacturer). 

Also, in general, it would not be allowable to parallel two different types of supplies as you have. 

You may be able to use ballast resistors to allow paralleling, but they would have to be calculated, would waste power, and would degrade regulation to your load.