R help - Mar 2014 - Error importing data from a personal geodatabase

I am trying to import data from a personal geodatabse into R. This code
worked previously, but I recently upgraded to Windows 7 and R 3.0.1 and it
no longer works. The error message is "Cannot open data source". Why
am I
getting this error? Code and session info below. Thanks for the help.
> # Set working directory
> directory <- "C:\\Users\\HBrantle\\Current_Projects\\ARYS"
> analysis.dir <- file.path(directory,"Data_Analysis")
> data.dir <- file.path(analysis.dir, "Data")
> gis.dir <- file.path(directory, "ARYS_GIS", "Data")
> # List feature classes in the ARYS geodatabase
> features <- ogrListLayers(dsn= file.path(gis.dir, "ARYS.mdb"))
Error in ogrListLayers(dsn = file.path(gis.dir, "ARYS.mdb")) :
  Cannot open data source
> run <- readOGR(dsn= file.path(gis.dir, "ARYS.mdb"),
features[1])
Error in nchar(layer) : object 'features' not
found
> file.info(file.path(gis.dir, "ARYS.mdb"))
size isdir mode               mtime
C:\\Users\\HBrantle\\Current_Projects\\ARYS/ARYS_GIS/Data/ARYS.mdb
195461120 FALSE  666 2014-03-06 11:02:25

     ctime               atime exe
C:\\Users\\HBrantle\\Current_Projects\\ARYS/ARYS_GIS/Data/ARYS.mdb
2014-03-05 18:44:53 2014-03-06 11:01:21  no
> ogrDrivers()
             name write
1      AeronavFAA FALSE
2          ARCGEN FALSE
3          AVCBin FALSE
4          AVCE00 FALSE
5             BNA  TRUE
6             CSV  TRUE
7             DGN  TRUE
8             DXF  TRUE
9          EDIGEO FALSE
10 ESRI Shapefile  TRUE
11     Geoconcept  TRUE
12        GeoJSON  TRUE
13       Geomedia FALSE
14         GeoRSS  TRUE
15            GML  TRUE
16            GMT  TRUE
17       GPSBabel  TRUE
18  GPSTrackMaker  TRUE
19            GPX  TRUE
20            HTF FALSE
21         Idrisi FALSE
22            KML  TRUE
23   MapInfo File  TRUE
24         Memory  TRUE
25   MSSQLSpatial  TRUE
26           ODBC  TRUE
27            ODS  TRUE
28        OpenAir FALSE
29         PCIDSK  TRUE
30            PDF  TRUE
31            PDS FALSE
32         PGDump  TRUE
33           PGeo FALSE
34            REC FALSE
35            S57  TRUE
36           SDTS FALSE
37       SEGUKOOA FALSE
38           SEGY FALSE
39            SUA FALSE
40            SVG FALSE
41          TIGER  TRUE
42        UK .NTF FALSE
43            VRT FALSE
44           XLSX  TRUE
45         XPlane FALSE
> sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)

locale:
[1] LC_COLLATE=English_United States.1252  LC_CTYPE=English_United
States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C

[5] LC_TIME=English_United States.1252

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] rgdal_0.8-16 sp_1.0-14

loaded via a namespace (and not attached):
[1] grid_3.0.1      lattice_0.20-15 tools_3.0.1

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