Cannot reset SMC, battery not charging to 100%

I got the battery replaced in my 13" MBP probably about a year ago, and now again it's showing some of the same symptoms.

If I unplug the magsafe power adapter, and plug it back in, no light comes on at all. So I'll try to perform SMC reset - and absolutely nothing happens. I mean that nothing happens when I try to reset the SMC - it just won't go through.

The only way I can get the light to turn back on on the adapter is to take the back off, and disconnect the little ribbon that is plugged in. After about 5 seconds, the light comes on and I'm fine as long as i keep it plugged in.

Also the battery will not charge to 100%, just stays at 90.

Here is some info:

Hardware Overview:

Model Name: MacBook Pro

Model Identifier: MacBookPro5,5

Processor Name: Intel Core 2 Duo

Processor Speed: 2.53 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache: 3 MB

Memory: 8 GB

Bus Speed: 1.07 GHz

Boot ROM Version: MBP55.00AC.B03

SMC Version (system): 1.47f2

Serial Number (system): W89428J066E

Hardware UUID: AB8F6457-929C-5FAE-BCED-9541CCCFC409

Sudden Motion Sensor:

State: Enabled

Battery Information:

Model Information:

Serial Number: W02314AKVD3LC

Manufacturer: SMP

Device Name: bq20z451

Pack Lot Code: 0

PCB Lot Code: 0

Firmware Version: 201

Hardware Revision: 000a

Cell Revision: 165

Charge Information:

Charge Remaining (mAh): 3987

Fully Charged: No

Charging: Yes

Full Charge Capacity (mAh): 4440

Health Information:

Cycle Count: 191

Condition: Normal

Battery Installed: Yes

Amperage (mA): 1381

Voltage (mV): 12520