Tor Browser – Problem Connecting?

So this is odd - i've been using TOR Browser for a while now with no issue, but then tonight I tried to connect and I get the following error message -

"Firefox can't establish a connection to the server at check.torproject.org."

I haven't changed any settings, and my log file contains the following:

Mar 07 00:41:46.678 [Notice] Tor v0.2.3.25 (git-17c24b3118224d65) running on Windows 7. Mar 07 00:41:46.678 [Notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Mar 07 00:41:46.678 [Notice] Read configuration file "C:UsersMyNameDesktopTor BrowserDataTortorrc". Mar 07 00:41:46.678 [Notice] Initialized libevent version 2.0.21-stable using method win32. Good. Mar 07 00:41:46.678 [Notice] Opening Socks listener on 127.0.0.1:9150 Mar 07 00:41:46.678 [Notice] Opening Control listener on 127.0.0.1:9151 Mar 07 00:41:46.791 [Notice] Parsing GEOIP file .DataTorgeoip. Mar 07 00:41:49.461 [Notice] No AES engine found; using AES_* functions. Mar 07 00:41:49.461 [Notice] This OpenSSL has a good implementation of counter mode; using it. Mar 07 00:41:49.461 [Notice] OpenSSL OpenSSL 1.0.0k 5 Feb 2013 looks like version 0.9.8m or later; I will try SSL_OP to enable renegotiation Mar 07 00:41:49.461 [Notice] Reloaded microdescriptor cache. Found 3175 descriptors. Mar 07 00:41:49.461 [Notice] We now have enough directory information to build circuits. Mar 07 00:41:49.461 [Notice] Bootstrapped 80%: Connecting to the Tor network. Mar 07 00:41:49.461 [Notice] New control connection opened. Mar 07 00:41:50.328 [Notice] Heartbeat: Tor's uptime is 0:00 hours, with 1 circuits open. I've sent 0 kB and received 0 kB. Mar 07 00:41:50.440 [Notice] Bootstrapped 85%: Finishing handshake with first hop. Mar 07 00:41:51.546 [Notice] Bootstrapped 90%: Establishing a Tor circuit. Mar 07 00:41:52.319 [Notice] Tor has successfully opened a circuit. Looks like client functionality is working. Mar 07 00:41:52.319 [Notice] Bootstrapped 100%: Done.

I'm not finding much help online - what could be the problem?

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Tor Browser - Problem Connecting?