Sorry no PS3 here.
I just use my Samsung Smart TV to stream from my router via DLNA. Works fine.
One thought... What format are you trying to stream from the router? They need to match what the PS3 can support. i.e. if the PS3 can't play MKV, you can't stream MKV from the router via DLNA. MiniDLNA does not transcode media.
If that's the case, you will have to convert your media to supported formats before you put them on the router.
I just use my Samsung Smart TV to stream from my router via DLNA. Works fine.
One thought... What format are you trying to stream from the router? They need to match what the PS3 can support. i.e. if the PS3 can't play MKV, you can't stream MKV from the router via DLNA. MiniDLNA does not transcode media.
If that's the case, you will have to convert your media to supported formats before you put them on the router.